64941637078 has 4 divisors (see below), whose sum is σ = 97412455620. Its totient is φ = 32470818538.

The previous prime is 64941637069. The next prime is 64941637087. The reversal of 64941637078 is 87073614946.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64941637069) and next prime (64941637087).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16235409268 + ... + 16235409271.

It is an arithmetic number, because the mean of its divisors is an integer number (24353113905).

Almost surely, 2^64941637078 is an apocalyptic number.

64941637078 is a deficient number, since it is larger than the sum of its proper divisors (32470818542).

64941637078 is a wasteful number, since it uses less digits than its factorization.

64941637078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32470818541.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 64941637078 in words is "sixty-four billion, nine hundred forty-one million, six hundred thirty-seven thousand, seventy-eight".